diplodocus.org Git - nmh/blob - uip/sendsbr.c

   1 /* sendsbr.c -- routines to help WhatNow/Send along
   2  *
   3  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   4  * COPYRIGHT file in the root directory of the nmh distribution for
   5  * complete copyright information.
   6  */
   7
   8 #include <h/mh.h>
   9 #include <h/fmt_scan.h>
  10 #include <h/fmt_compile.h>
  11 #include <h/signals.h>
  12 #include <setjmp.h>
  13 #include <fcntl.h>
  14 #include <h/mime.h>
  15 #include <h/tws.h>
  16 #include <h/utils.h>
  17 #include <h/mts.h>
  18
  19 #ifdef HAVE_SYS_TIME_H
  20 # include <sys/time.h>
  21 #endif
  22 #include <time.h>
  23
  24 #ifdef OAUTH_SUPPORT
  25 #include <h/oauth.h>
  26 #endif
  27 #include "sbr/m_maildir.h"
  28 #include "sbr/m_mktemp.h"
  29 #include "sbr/message_id.h"
  30
  31 #ifdef OAUTH_SUPPORT
  32 static int setup_oauth_params(char *[], int *, const char *, const char **);
  33 #endif /* OAUTH_SUPPORT */
  34
  35 int debugsw = 0;                /* global */
  36 int forwsw  = 1;
  37 int inplace = 1;
  38 int pushsw  = 0;
  39 int splitsw = -1;
  40 int unique  = 0;
  41 int verbsw  = 0;
  42
  43 char *altmsg   = NULL;          /*  .. */
  44 char *annotext = NULL;
  45 char *distfile = NULL;
  46
  47 static jmp_buf env;
  48
  49 /*
  50  * static prototypes
  51  */
  52 static void alert (char *, int);
  53 static int tmp_fd (void);
  54 static void anno (int, struct stat *);
  55 static void annoaux (int);
  56 static int splitmsg (char **, int, char *, char *, struct stat *, int);
  57 static int sendaux (char **, int, char *, char *, struct stat *);
  58 static void handle_sendfrom(char **, int *, char *, const char *);
  59 static int get_from_header_info(const char *, const char **, const char **, const char **);
  60 static const char *get_message_header_info(FILE *, char *);
  61 static void merge_profile_entry(const char *, const char *, char *[], int *);
  62 static void armed_done (int) NORETURN;
  63
  64 /*
  65  * Entry point into (back-end) routines to send message.
  66  */
  67
  68 int
  69 sendsbr (char **vec, int vecp, char *program, char *draft, struct stat *st,
  70          int rename_drft, const char *auth_svc)
  71 {
  72     int status, i;
  73     pid_t child;
  74     char buffer[BUFSIZ], file[BUFSIZ];
  75     struct stat sts;
  76     char **buildvec, *buildprogram;
  77     char *volatile drft = draft;
  78     /* nvecs is volatile to prevent warning from gcc about possible clobbering
  79        by longjmp. */
  80     volatile int nvecs = vecp;
  81     int *nvecsp = (int *) &nvecs;
  82
  83     /*
  84      * Run the mimebuildproc (which is by default mhbuild) on the message
  85      * with the addition of the "-auto" flag
  86      */
  87
  88     switch (child = fork()) {
  89     case NOTOK:
  90         adios("fork", "unable to");
  91         break;
  92
  93     case OK:
  94         buildvec = argsplit(buildmimeproc, &buildprogram, &i);
  95         buildvec[i++] = "-auto";
  96         if (distfile)
  97             buildvec[i++] = "-dist";
  98         buildvec[i++] = (char *) drft;
  99         buildvec[i] = NULL;
 100         execvp(buildprogram, buildvec);
 101         fprintf(stderr, "unable to exec ");
 102         perror(buildmimeproc);
 103         _exit(-1);
 104         break;
 105
 106     default:
 107         if (pidXwait(child, buildmimeproc))
 108             return NOTOK;
 109         break;
 110     }
 111
 112     done=armed_done;
 113     switch (setjmp (env)) {
 114     case OK:
 115         /*
 116          * If given -push and -unique (which is undocumented), then
 117          * rename the draft file.  I'm not quite sure why.
 118          */
 119         if (pushsw && unique) {
 120             char *cp = m_mktemp2(drft, invo_name, NULL, NULL);
 121             if (cp == NULL) {
 122                 adios(NULL, "unable to create temporary file in %s",
 123                       get_temp_dir());
 124             }
 125             if (rename (drft, strncpy(file, cp, sizeof(file))) == NOTOK)
 126                 adios (file, "unable to rename %s to", drft);
 127             drft = file;
 128         }
 129
 130         /*
 131          * Add in any necessary profile entries for xoauth
 132          */
 133
 134         if (auth_svc) {
 135 #ifdef OAUTH_SUPPORT
 136                 const char *errmsg;
 137                 if (setup_oauth_params(vec, nvecsp, auth_svc, &errmsg) != OK) {
 138                         adios(NULL, "%s", errmsg);
 139                 }
 140 #else
 141                 adios(NULL, "send built without OAUTH_SUPPORT, "
 142                       "so auth_svc %s is not supported", auth_svc);
 143 #endif /* OAUTH_SUPPORT */
 144         }
 145
 146         /*
 147          * Rework the vec based on From: header in draft, as specified
 148          * by sendfrom-address entries in profile.
 149          */
 150         if (context_find_prefix("sendfrom-")) {
 151             handle_sendfrom(vec, nvecsp, draft, auth_svc);
 152         }
 153
 154         /*
 155          * Check if we need to split the message into
 156          * multiple messages of type "message/partial".
 157          */
 158         if (splitsw >= 0 && !distfile && stat ((char *) drft, &sts) != NOTOK
 159                 && sts.st_size >= CPERMSG) {
 160             status = splitmsg (vec, nvecs, program, drft,
 161                                st, splitsw) ? NOTOK : OK;
 162         } else {
 163             status = sendaux (vec, nvecs, program, drft, st) ? NOTOK : OK;
 164         }
 165
 166         /* rename the original draft */
 167         if (rename_drft && status == OK &&
 168                 rename (drft, strncpy (buffer, m_backup (drft),
 169                                  sizeof(buffer))) == NOTOK)
 170             advise (buffer, "unable to rename %s to", drft);
 171         break;
 172
 173     default:
 174         status = DONE;
 175         break;
 176     }
 177
 178     done=exit;
 179     if (distfile)
 180         (void) m_unlink (distfile);
 181
 182     return status;
 183 }
 184
 185 /*
 186  * Split large message into several messages of
 187  * type "message/partial" and send them.
 188  */
 189
 190 static int
 191 splitmsg (char **vec, int vecp, char *program, char *drft,
 192           struct stat *st, int delay)
 193 {
 194     int compnum, nparts, partno, state, status;
 195     long pos, start;
 196     time_t clock;
 197     char *cp, *dp, buffer[NMH_BUFSIZ], msgid[BUFSIZ];
 198     char subject[BUFSIZ];
 199     char name[NAMESZ], partnum[BUFSIZ];
 200     FILE *in;
 201     m_getfld_state_t gstate;
 202
 203     if ((in = fopen (drft, "r")) == NULL)
 204         adios (drft, "unable to open for reading");
 205
 206     cp = dp = NULL;
 207     start = 0L;
 208
 209     /*
 210      * Scan through the message and examine the various header fields,
 211      * as well as locate the beginning of the message body.
 212      */
 213     gstate = m_getfld_state_init(in);
 214     m_getfld_track_filepos2(&gstate);
 215     for (compnum = 1;;) {
 216         int bufsz = sizeof buffer;
 217         switch (state = m_getfld2(&gstate, name, buffer, &bufsz)) {
 218             case FLD:
 219             case FLDPLUS:
 220                 compnum++;
 221
 222                 /*
 223                  * This header field is discarded.
 224                  */
 225                 if (!strcasecmp (name, "Message-ID")) {
 226                     while (state == FLDPLUS) {
 227                         bufsz = sizeof buffer;
 228                         state = m_getfld2(&gstate, name, buffer, &bufsz);
 229                     }
 230                 } else if (uprf (name, XXX_FIELD_PRF)
 231                         || !strcasecmp (name, VRSN_FIELD)
 232                         || !strcasecmp (name, "Subject")
 233                         || !strcasecmp (name, "Encrypted")) {
 234                     /*
 235                      * These header fields are copied to the enclosed
 236                      * header of the first message in the collection
 237                      * of message/partials.  For the "Subject" header
 238                      * field, we also record it, so that a modified
 239                      * version of it, can be copied to the header
 240                      * of each message/partial in the collection.
 241                      */
 242                     if (!strcasecmp (name, "Subject")) {
 243                         size_t sublen;
 244
 245                         strncpy (subject, buffer, BUFSIZ);
 246                         sublen = strlen (subject);
 247                         if (sublen > 0 && subject[sublen - 1] == '\n')
 248                             subject[sublen - 1] = '\0';
 249                     }
 250
 251                     dp = add (concat (name, ":", buffer, NULL), dp);
 252                     while (state == FLDPLUS) {
 253                         bufsz = sizeof buffer;
 254                         state = m_getfld2(&gstate, name, buffer, &bufsz);
 255                         dp = add (buffer, dp);
 256                     }
 257                 } else {
 258                     /*
 259                      * These header fields are copied to the header of
 260                      * each message/partial in the collection.
 261                      */
 262                     cp = add (concat (name, ":", buffer, NULL), cp);
 263                     while (state == FLDPLUS) {
 264                         bufsz = sizeof buffer;
 265                         state = m_getfld2(&gstate, name, buffer, &bufsz);
 266                         cp = add (buffer, cp);
 267                     }
 268                 }
 269
 270                 start = ftell (in) + 1;
 271                 continue;
 272
 273            case BODY:
 274            case FILEEOF:
 275                 break;
 276
 277            case LENERR:
 278            case FMTERR:
 279                 adios (NULL, "message format error in component #%d", compnum);
 280
 281            default:
 282                 adios (NULL, "getfld () returned %d", state);
 283         }
 284
 285         break;
 286     }
 287     m_getfld_state_destroy (&gstate);
 288     if (cp == NULL)
 289         adios (NULL, "headers missing from draft");
 290
 291     nparts = 1;
 292     pos = start;
 293     while (fgets (buffer, sizeof buffer, in)) {
 294         long len;
 295
 296         if ((pos += (len = strlen (buffer))) > CPERMSG) {
 297             nparts++;
 298             pos = len;
 299         }
 300     }
 301
 302     /* Only one part, nothing to split */
 303     if (nparts == 1) {
 304         free (cp);
 305         free(dp);
 306
 307         fclose (in);
 308         return sendaux (vec, vecp, program, drft, st);
 309     }
 310
 311     if (!pushsw) {
 312         printf ("Sending as %d Partial Messages\n", nparts);
 313         fflush (stdout);
 314     }
 315     status = OK;
 316
 317     vec[vecp++] = "-partno";
 318     vec[vecp++] = partnum;
 319     if (delay == 0)
 320         vec[vecp++] = "-queued";
 321
 322     time (&clock);
 323     snprintf (msgid, sizeof(msgid), "%s", message_id (clock, 0));
 324
 325     fseek (in, start, SEEK_SET);
 326     for (partno = 1; partno <= nparts; partno++) {
 327         char tmpdrf[BUFSIZ];
 328         FILE *out;
 329
 330         char *cp = m_mktemp2(drft, invo_name, NULL, &out);
 331         if (cp == NULL) {
 332             adios(NULL, "unable to create temporary file in %s",
 333                   get_temp_dir());
 334         }
 335         strncpy(tmpdrf, cp, sizeof(tmpdrf));
 336
 337         /*
 338          * Output the header fields
 339          */
 340         fputs (cp, out);
 341         fprintf (out, "Subject: %s (part %d of %d)\n", subject, partno, nparts);
 342         fprintf (out, "%s: %s\n", VRSN_FIELD, VRSN_VALUE);
 343         fprintf (out, "%s: message/partial; id=\"%s\";\n", TYPE_FIELD, msgid);
 344         fprintf (out, "\tnumber=%d; total=%d\n", partno, nparts);
 345         fprintf (out, "%s: part %d of %d\n\n", DESCR_FIELD, partno, nparts);
 346
 347         /*
 348          * If this is the first in the collection, output the
 349          * header fields we are encapsulating at the beginning
 350          * of the body of the first message.
 351          */
 352         if (partno == 1) {
 353             if (dp)
 354                 fputs (dp, out);
 355             fprintf (out, "Message-ID: %s\n", msgid);
 356             fprintf (out, "\n");
 357         }
 358
 359         pos = 0;
 360         for (;;) {
 361             long len;
 362
 363             if (!fgets (buffer, sizeof buffer, in)) {
 364                 if (partno == nparts)
 365                     break;
 366                 adios (NULL, "premature eof");
 367             }
 368
 369             if ((pos += (len = strlen (buffer))) > CPERMSG) {
 370                 fseek (in, -len, SEEK_CUR);
 371                 break;
 372             }
 373
 374             fputs (buffer, out);
 375         }
 376
 377         if (fflush (out))
 378             adios (tmpdrf, "error writing to");
 379
 380         fclose (out);
 381
 382         if (!pushsw && verbsw) {
 383             putchar('\n');
 384             fflush (stdout);
 385         }
 386
 387         /* Pause here, if a delay is specified */
 388         if (delay > 0 && 1 < partno && partno <= nparts) {
 389             if (!pushsw) {
 390                 printf ("pausing %d seconds before sending part %d...\n",
 391                         delay, partno);
 392                 fflush (stdout);
 393             }
 394             sleep ((unsigned int) delay);
 395         }
 396
 397         snprintf (partnum, sizeof(partnum), "%d", partno);
 398         status = sendaux (vec, vecp, program, tmpdrf, st);
 399         (void) m_unlink (tmpdrf);
 400         if (status != OK)
 401             break;
 402
 403         /*
 404          * This is so sendaux will only annotate
 405          * the altmsg the first time it is called.
 406          */
 407         annotext = NULL;
 408     }
 409
 410     free (cp);
 411     free(dp);
 412
 413     fclose (in);        /* close the draft */
 414     return status;
 415 }
 416
 417
 418 /*
 419  * Annotate original message, and
 420  * call `postproc' (which is passed down in "program") to send message.
 421  */
 422
 423 static int
 424 sendaux (char **vec, int vecp, char *program, char *drft, struct stat *st)
 425 {
 426     pid_t child_id;
 427     int status, fd, fd2;
 428     char backup[BUFSIZ], buf[BUFSIZ];
 429
 430     fd = pushsw ? tmp_fd () : NOTOK;
 431     fd2 = NOTOK;
 432
 433     if (annotext) {
 434         if ((fd2 = tmp_fd ()) != NOTOK) {
 435             vec[vecp++] = "-idanno";
 436             snprintf (buf, sizeof(buf), "%d", fd2);
 437             vec[vecp++] = buf;
 438         } else {
 439             inform("unable to create temporary file in %s for "
 440                 "annotation list, continuing...", get_temp_dir());
 441         }
 442     }
 443     vec[vecp++] = drft;
 444     if (distfile && distout (drft, distfile, backup) == NOTOK)
 445         done (1);
 446     vec[vecp] = NULL;
 447
 448     child_id = fork();
 449     switch (child_id) {
 450     case -1:
 451         /* oops -- fork error */
 452         adios ("fork", "unable to");
 453         break;  /* NOT REACHED */
 454
 455     case 0:
 456         /*
 457          * child process -- send it
 458          *
 459          * If fd is OK, then we are pushing and fd points to temp
 460          * file, so capture anything on stdout and stderr there.
 461          */
 462         if (fd != NOTOK) {
 463             dup2 (fd, fileno (stdout));
 464             dup2 (fd, fileno (stderr));
 465             close (fd);
 466         }
 467         execvp (program, vec);
 468         fprintf (stderr, "unable to exec ");
 469         perror (postproc);
 470         _exit (-1);
 471
 472     default:
 473         /*
 474          * parent process -- wait for it
 475          */
 476         if ((status = pidwait(child_id, NOTOK)) == OK) {
 477             if (annotext && fd2 != NOTOK)
 478                 anno (fd2, st);
 479         } else {
 480             /*
 481              * If postproc failed, and we have good fd (which means
 482              * we pushed), then mail error message (and possibly the
 483              * draft) back to the user.
 484              */
 485             if (fd != NOTOK) {
 486                 alert (drft, fd);
 487                 close (fd);
 488             } else {
 489                 inform("message not delivered to anyone");
 490             }
 491             if (annotext && fd2 != NOTOK)
 492                 close (fd2);
 493             if (distfile) {
 494                 (void) m_unlink (drft);
 495                 if (rename (backup, drft) == NOTOK)
 496                     advise (drft, "unable to rename %s to", backup);
 497             }
 498         }
 499         break;
 500     }
 501
 502     return status;
 503 }
 504
 505
 506 /*
 507  * Mail error notification (and possibly a copy of the
 508  * message) back to the user, using the mailproc
 509  */
 510
 511 static void
 512 alert (char *file, int out)
 513 {
 514     pid_t child_id;
 515     int in, argp;
 516     char buf[BUFSIZ];
 517     char *program;
 518     char **arglist;
 519
 520     child_id = fork();
 521     switch (child_id) {
 522         case NOTOK:
 523             /* oops -- fork error */
 524             advise ("fork", "unable to");
 525             /* FALLTHRU */
 526
 527         case OK:
 528             /* child process -- send it */
 529             SIGNAL (SIGHUP, SIG_IGN);
 530             SIGNAL (SIGINT, SIG_IGN);
 531             SIGNAL (SIGQUIT, SIG_IGN);
 532             SIGNAL (SIGTERM, SIG_IGN);
 533             if (forwsw) {
 534                 if ((in = open (file, O_RDONLY)) == NOTOK) {
 535                     admonish (file, "unable to re-open");
 536                 } else {
 537                     lseek(out, 0, SEEK_END);
 538                     strncpy (buf, "\nMessage not delivered to anyone.\n", sizeof(buf));
 539                     if (write (out, buf, strlen (buf)) < 0) {
 540                         advise (file, "write");
 541                     }
 542                     strncpy (buf, "\n------- Unsent Draft\n\n", sizeof(buf));
 543                     if (write (out, buf, strlen (buf)) < 0) {
 544                         advise (file, "write");
 545                     }
 546                     cpydgst (in, out, file, "temporary file");
 547                     close (in);
 548                     strncpy (buf, "\n------- End of Unsent Draft\n", sizeof(buf));
 549                     if (write (out, buf, strlen (buf)) < 0) {
 550                         advise (file, "write");
 551                     }
 552                     if (rename (file, strncpy (buf, m_backup (file), sizeof(buf))) == NOTOK)
 553                         admonish (buf, "unable to rename %s to", file);
 554                 }
 555             }
 556             lseek(out, 0, SEEK_SET);
 557             dup2 (out, fileno (stdin));
 558             close (out);
 559             /* create subject for error notification */
 560             snprintf (buf, sizeof(buf), "send failed on %s",
 561                         forwsw ? "enclosed draft" : file);
 562
 563             arglist = argsplit(mailproc, &program, &argp);
 564
 565             arglist[argp++] = getusername();
 566             arglist[argp++] = "-subject";
 567             arglist[argp++] = buf;
 568             arglist[argp] = NULL;
 569
 570             execvp (program, arglist);
 571             fprintf (stderr, "unable to exec ");
 572             perror (mailproc);
 573             _exit (-1);
 574
 575         default:                /* no waiting... */
 576             break;
 577     }
 578 }
 579
 580
 581 static int
 582 tmp_fd (void)
 583 {
 584     int fd;
 585     char *tfile;
 586
 587     if ((tfile = m_mktemp2(NULL, invo_name, &fd, NULL)) == NULL) return NOTOK;
 588
 589     if (debugsw)
 590         inform("temporary file %s selected", tfile);
 591     else if (m_unlink (tfile) == NOTOK)
 592         advise (tfile, "unable to remove");
 593
 594     return fd;
 595 }
 596
 597
 598 static void
 599 anno (int fd, struct stat *st)
 600 {
 601     pid_t child_id;
 602     sigset_t set, oset;
 603     static char *cwd = NULL;
 604     struct stat st2;
 605
 606     if (altmsg &&
 607             (stat (altmsg, &st2) == NOTOK
 608                 || st->st_mtime != st2.st_mtime
 609                 || st->st_dev != st2.st_dev
 610                 || st->st_ino != st2.st_ino)) {
 611         if (debugsw)
 612             inform("$mhaltmsg mismatch, continuing...");
 613         return;
 614     }
 615
 616     child_id = debugsw ? NOTOK : fork ();
 617     switch (child_id) {
 618         case NOTOK:             /* oops */
 619             if (!debugsw)
 620                 inform("unable to fork, so doing annotations by hand...");
 621             if (cwd == NULL)
 622                 cwd = mh_xstrdup(pwd ());
 623             /* FALLTHRU */
 624
 625         case OK:
 626             /* block a few signals */
 627             sigemptyset (&set);
 628             sigaddset (&set, SIGHUP);
 629             sigaddset (&set, SIGINT);
 630             sigaddset (&set, SIGQUIT);
 631             sigaddset (&set, SIGTERM);
 632             sigprocmask (SIG_BLOCK, &set, &oset);
 633
 634             unregister_for_removal(0);
 635
 636             annoaux (fd);
 637             if (child_id == OK)
 638                 _exit (0);
 639
 640             /* reset the signal mask */
 641             sigprocmask (SIG_SETMASK, &oset, &set);
 642
 643             if (chdir (cwd) < 0) {
 644                 advise (cwd, "chdir");
 645             }
 646             break;
 647
 648         default:                /* no waiting... */
 649             close (fd);
 650             break;
 651     }
 652 }
 653
 654
 655 static void
 656 annoaux (int fd)
 657 {
 658     int fd2, fd3, msgnum;
 659     char *cp, *folder, *maildir;
 660     char buffer[BUFSIZ], **ap;
 661     FILE *fp;
 662     struct msgs *mp;
 663
 664     if ((folder = getenv ("mhfolder")) == NULL || *folder == 0) {
 665         if (debugsw)
 666             inform("$mhfolder not set, continuing...");
 667         return;
 668     }
 669     maildir = m_maildir (folder);
 670     if (chdir (maildir) == NOTOK) {
 671         if (debugsw)
 672             admonish (maildir, "unable to change directory to");
 673         return;
 674     }
 675     if (!(mp = folder_read (folder, 0))) {
 676         if (debugsw)
 677             inform("unable to read folder %s, continuing...", folder);
 678         return;
 679     }
 680
 681     /* check for empty folder */
 682     if (mp->nummsg == 0) {
 683         if (debugsw)
 684             inform("no messages in %s, continuing...", folder);
 685         goto oops;
 686     }
 687
 688     if ((cp = getenv ("mhmessages")) == NULL || *cp == 0) {
 689         if (debugsw)
 690             inform("$mhmessages not set, continuing...");
 691         goto oops;
 692     }
 693     if (!debugsw                        /* MOBY HACK... */
 694             && pushsw
 695             && (fd3 = open ("/dev/null", O_RDWR)) != NOTOK
 696             && (fd2 = dup (fileno (stderr))) != NOTOK) {
 697         dup2 (fd3, fileno (stderr));
 698         close (fd3);
 699     }
 700     else
 701         fd2 = NOTOK;
 702     for (ap = brkstring (cp = mh_xstrdup(cp), " ", NULL); *ap; ap++)
 703         m_convert (mp, *ap);
 704     free (cp);
 705     if (fd2 != NOTOK)
 706         dup2 (fd2, fileno (stderr));
 707     if (mp->numsel == 0) {
 708         if (debugsw)
 709             inform("no messages to annotate, continuing...");
 710         goto oops;
 711     }
 712
 713     lseek(fd, 0, SEEK_SET);
 714     if ((fp = fdopen (fd, "r")) == NULL) {
 715         if (debugsw)
 716             inform("unable to fdopen annotation list, continuing...");
 717         goto oops;
 718     }
 719     cp = NULL;
 720     while (fgets (buffer, sizeof(buffer), fp) != NULL)
 721         cp = add (buffer, cp);
 722     fclose (fp);
 723
 724     if (debugsw)
 725         inform("annotate%s with %s: \"%s\"",
 726                 inplace ? " inplace" : "", annotext, cp);
 727     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
 728         if (is_selected(mp, msgnum)) {
 729             if (debugsw)
 730                 inform("annotate message %d", msgnum);
 731             annotate (m_name (msgnum), annotext, cp, inplace, 1, -2, 0);
 732         }
 733     }
 734
 735     free (cp);
 736
 737 oops:
 738     folder_free (mp);   /* free folder/message structure */
 739 }
 740
 741
 742 static
 743 void
 744 handle_sendfrom(char **vec, int *vecp, char *draft, const char *auth_svc) {
 745     const char *addr, *host;
 746     const char *message;
 747
 748     /* Extract address and host from From: header line in draft. */
 749     if (get_from_header_info(draft, &addr, &host, &message) != OK) {
 750         adios(draft, "%s", message);
 751     }
 752
 753     /* Merge in any address or host specific switches to post(1) from profile. */
 754     merge_profile_entry(addr, host, vec, vecp);
 755     free((void *) host);
 756     free((void *) addr);
 757
 758     vec[*vecp] = NULL;
 759
 760     {
 761         char **vp;
 762
 763         for (vp = vec; *vp; ++vp) {
 764             if (strcmp(*vp, "xoauth2") == 0) {
 765 #ifdef OAUTH_SUPPORT
 766                 if (setup_oauth_params(vec, vecp, auth_svc, &message) != OK) {
 767                     adios(NULL, "%s", message);
 768                 }
 769                 break;
 770 #else
 771                 NMH_UNUSED(auth_svc);
 772                 adios(NULL, "send built without OAUTH_SUPPORT, "
 773                       "so -saslmech xoauth2 is not supported");
 774 #endif /* OAUTH_SUPPORT */
 775             }
 776         }
 777     }
 778 }
 779
 780
 781 #ifdef OAUTH_SUPPORT
 782 /*
 783  * For XOAUTH2, append profile entries so post can do the heavy lifting
 784  */
 785 static int
 786 setup_oauth_params(char *vec[], int *vecp, const char *auth_svc,
 787                    const char **message) {
 788     const char *saslmech = NULL, *user = NULL;
 789     mh_oauth_service_info svc;
 790     char errbuf[256];
 791     int i;
 792
 793     /* Make sure we have all the information we need. */
 794     for (i = 1; i < *vecp; ++i) {
 795         /* Don't support abbreviated switches, to avoid collisions in the
 796            future if new ones are added. */
 797         if (! strcmp(vec[i-1], "-saslmech")) {
 798             saslmech = vec[i];
 799         } else if (! strcmp(vec[i-1], "-user")) {
 800             user = vec[i];
 801         } else if (! strcmp(vec[i-1], "-authservice")) {
 802             auth_svc = vec[i];
 803         }
 804     }
 805
 806     if (auth_svc == NULL) {
 807         if (saslmech  &&  ! strcasecmp(saslmech, "xoauth2")) {
 808             *message = "must specify -authservice with -saslmech xoauth2";
 809             return NOTOK;
 810         }
 811     } else {
 812         if (user == NULL) {
 813             *message = "must specify -user with -saslmech xoauth2";
 814             return NOTOK;
 815         }
 816
 817         if (saslmech  &&  ! strcasecmp(saslmech, "xoauth2")) {
 818             if (! mh_oauth_get_service_info(auth_svc, &svc, errbuf,
 819                                             sizeof(errbuf)))
 820                 adios(NULL, "Unable to retrieve oauth profile entries: %s",
 821                       errbuf);
 822
 823             vec[(*vecp)++] = mh_xstrdup("-authservice");
 824             vec[(*vecp)++] = mh_xstrdup(auth_svc);
 825             vec[(*vecp)++] = mh_xstrdup("-oauthcredfile");
 826             vec[(*vecp)++] = mh_xstrdup(mh_oauth_cred_fn(auth_svc));
 827             vec[(*vecp)++] = mh_xstrdup("-oauthclientid");
 828             vec[(*vecp)++] = getcpy(svc.client_id);
 829             vec[(*vecp)++] = mh_xstrdup("-oauthclientsecret");
 830             vec[(*vecp)++] = getcpy(svc.client_secret);
 831             vec[(*vecp)++] = mh_xstrdup("-oauthauthendpoint");
 832             vec[(*vecp)++] = getcpy(svc.auth_endpoint);
 833             vec[(*vecp)++] = mh_xstrdup("-oauthredirect");
 834             vec[(*vecp)++] = getcpy(svc.redirect_uri);
 835             vec[(*vecp)++] = mh_xstrdup("-oauthtokenendpoint");
 836             vec[(*vecp)++] = getcpy(svc.token_endpoint);
 837             vec[(*vecp)++] = mh_xstrdup("-oauthscope");
 838             vec[(*vecp)++] = getcpy(svc.scope);
 839         }
 840     }
 841
 842     return 0;
 843 }
 844 #endif /* OAUTH_SUPPORT */
 845
 846
 847 /*
 848  * Extract user and domain from From: header line in draft.
 849  */
 850 static
 851 int
 852 get_from_header_info(const char *filename, const char **addr, const char **host, const char **message) {
 853     struct stat st;
 854     FILE *in;
 855
 856     if (stat (filename, &st) == NOTOK) {
 857         *message = "unable to stat draft file";
 858         return NOTOK;
 859     }
 860
 861     if ((in = fopen (filename, "r")) != NULL) {
 862         /* There must be a non-blank Envelope-From or {Resent-}Sender or
 863            {Resent-}From header. */
 864         char *addrformat = "%(addr{Envelope-From})";
 865         char *hostformat = "%(host{Envelope-From})";
 866
 867         if ((*addr = get_message_header_info (in, addrformat)) == NULL  ||
 868             !**addr) {
 869             addrformat = distfile == NULL  ?  "%(addr{Sender})"  :  "%(addr{Resent-Sender})";
 870             hostformat = distfile == NULL  ?  "%(host{Sender})"  :  "%(host{Resent-Sender})";
 871
 872             if ((*addr = get_message_header_info (in, addrformat)) == NULL) {
 873                 addrformat = distfile == NULL  ?  "%(addr{From})"  :  "%(addr{Resent-From})";
 874                 hostformat = distfile == NULL  ?  "%(host{From})"  :  "%(host{Resent-From})";
 875
 876                 if ((*addr = get_message_header_info (in, addrformat)) == NULL) {
 877                     *message = "unable to find sender address in";
 878                     fclose(in);
 879                     return NOTOK;
 880                 }
 881             }
 882         }
 883
 884         /* Use the hostformat that corresponds to the successful addrformat. */
 885         if ((*host = get_message_header_info(in, hostformat)) == NULL) {
 886             *message = "unable to find sender host";
 887             fclose(in);
 888             return NOTOK;
 889         }
 890         fclose(in);
 891
 892         return OK;
 893     }
 894
 895     *message = "unable to open";
 896     return NOTOK;
 897 }
 898
 899
 900 /*
 901  * Get formatted information from header of a message.
 902  * Adapted from process_single_file() in uip/fmttest.c.
 903  */
 904 static
 905 const char *
 906 get_message_header_info(FILE *in, char *format) {
 907     int dat[5];
 908     struct format *fmt;
 909     struct stat st;
 910     int parsing_header;
 911     m_getfld_state_t gstate;
 912     charstring_t buffer = charstring_create(0);
 913     char *retval;
 914
 915     dat[0] = dat[1] = dat[4] = 0;
 916     dat[2] = fstat(fileno(in), &st) == 0  ?  st.st_size  :  0;
 917     dat[3] = INT_MAX;
 918
 919     (void) fmt_compile(new_fs(NULL, NULL, format), &fmt, 1);
 920     free_fs();
 921
 922     /*
 923      * Read in the message and process the header.
 924      */
 925     rewind (in);
 926     parsing_header = 1;
 927     gstate = m_getfld_state_init(in);
 928     do {
 929         char name[NAMESZ], rbuf[NMH_BUFSIZ];
 930         int bufsz = sizeof rbuf;
 931         int state = m_getfld2(&gstate, name, rbuf, &bufsz);
 932
 933         switch (state) {
 934         case FLD:
 935         case FLDPLUS: {
 936             int bucket = fmt_addcomptext(name, rbuf);
 937
 938             if (bucket != -1) {
 939                 while (state == FLDPLUS) {
 940                     bufsz = sizeof rbuf;
 941                     state = m_getfld2(&gstate, name, rbuf, &bufsz);
 942                     fmt_appendcomp(bucket, name, rbuf);
 943                 }
 944             }
 945
 946             while (state == FLDPLUS) {
 947                 bufsz = sizeof rbuf;
 948                 state = m_getfld2(&gstate, name, rbuf, &bufsz);
 949             }
 950             break;
 951         }
 952         default:
 953             parsing_header = 0;
 954         }
 955     } while (parsing_header);
 956     m_getfld_state_destroy(&gstate);
 957
 958     fmt_scan(fmt, buffer, INT_MAX, dat, NULL);
 959     fmt_free(fmt, 1);
 960
 961     /* Trim trailing newline, if any. */
 962     retval = rtrim(charstring_buffer_copy((buffer)));
 963     charstring_free(buffer);
 964     if (*retval)
 965         return retval;
 966
 967     free(retval);
 968     return NULL;
 969 }
 970
 971
 972 /*
 973  * Look in profile for entry corresponding to addr or host, and add its contents to vec.
 974  *
 975  * Could do some of this automatically, by looking for:
 976  * 1) access-$(mbox{from}) in oauth-svc file using mh_oauth_cred_load(), which isn't
 977  *    static and doesn't have side effects; free the result with mh_oauth_cred_free())
 978  * 2) machine $(mbox{from}) in creds
 979  * If no -server passed in from profile or commandline, could use smtp.<svc>.com for gmail,
 980  * but that might not generalize for other svcs.
 981  */
 982 static
 983 void
 984 merge_profile_entry(const char *addr, const char *host, char *vec[], int *vecp) {
 985     char *addr_entry = concat("sendfrom-", addr, NULL);
 986     char *profile_entry = context_find(addr_entry);
 987
 988     free(addr_entry);
 989     if (profile_entry == NULL) {
 990         /* No entry for the user.  Look for one for the host. */
 991         char *host_entry = concat("sendfrom-", host, NULL);
 992
 993         profile_entry = context_find(host_entry);
 994         free(host_entry);
 995     }
 996
 997     /* Use argsplit() to do the real work of splitting the args in the profile entry. */
 998     if (profile_entry && *profile_entry) {
 999         int profile_vecp;
1000         char *file;
1001         char **profile_vec = argsplit(profile_entry, &file, &profile_vecp);
1002         int i;
1003
1004         for (i = 0; i < profile_vecp; ++i) {
1005             vec[(*vecp)++] = getcpy(profile_vec[i]);
1006         }
1007
1008         arglist_free(file, profile_vec);
1009     }
1010 }
1011
1012
1013 static void NORETURN
1014 armed_done (int status)
1015 {
1016     longjmp (env, status ? status : NOTOK);
1017 }